CN116330711A - Preparation method of release-cloth-free large Liang Laji plate and product thereof - Google Patents
Preparation method of release-cloth-free large Liang Laji plate and product thereof Download PDFInfo
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- CN116330711A CN116330711A CN202211330013.6A CN202211330013A CN116330711A CN 116330711 A CN116330711 A CN 116330711A CN 202211330013 A CN202211330013 A CN 202211330013A CN 116330711 A CN116330711 A CN 116330711A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 26
- 239000003292 glue Substances 0.000 claims abstract description 22
- 239000004744 fabric Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000000678 plasma activation Methods 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000001723 curing Methods 0.000 claims description 25
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000002516 radical scavenger Substances 0.000 claims description 9
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 6
- 238000013007 heat curing Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 229940123457 Free radical scavenger Drugs 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 2
- 230000001070 adhesive effect Effects 0.000 claims 2
- 239000000835 fiber Substances 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 239000000306 component Substances 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- XITRBUPOXXBIJN-UHFFFAOYSA-N bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)NC(C)(C)C1 XITRBUPOXXBIJN-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000011417 postcuring Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a preparation method of a large Liang Laji plate of a release-free cloth and a product thereof. According to the preparation method of the large Liang Laji plate without release cloth, the release cloth is not used, the fiber yarn and the resin glue solution are directly used as raw materials for impregnating and solidifying the plate, the surface energy of the plate is effectively improved by carrying out plasma activation treatment on the surface of the plate, and the prepared large Liang Laji plate has good mechanical property and high bonding strength with poured resin; the process of the invention is more simplified and efficient.
Description
Technical Field
The invention relates to the technical field of wind power blade preparation, in particular to a preparation method of a large Liang Laji plate of a release-cloth-free blade and a product thereof.
Background
In recent years, with the increase of awareness of energy conservation and emission reduction, wind power generation related technologies have been developed rapidly. The wind power blade is a core component for converting natural wind energy into electric energy of the wind power generator set, the blade girder is the most important component of the wind power blade, and the wind power blade bears the whole wind resistance and is a key component for determining the performance of the wind power blade.
The preparation method of the blade girder mainly comprises two modes of vacuum pouring production and extruding and pulling plate production. The vacuum pouring production method needs to produce girder moulds, the girders are duplicated on the surfaces of the moulds, the girders are paved (woven fabric of fibers) on the surfaces, pipes are distributed, resin is led in, and then the girder moulds are solidified and formed, so that the production efficiency is low, the cost is high and the like. At present, more than 90% of blade girders are manufactured by adopting a pultrusion plate production method.
The manufacturing method of the pultrusion plate is that firstly, the prefabricated plate is produced by adopting the pultrusion method, and then the prefabricated plate is paved, stacked and resin poured and bonded. In the case of prefabricating a plate by a pultrusion method, release cloths are usually laid on the upper and lower surfaces of the plate, and the release cloths are torn off after molding, as shown in the disclosure of chinese patent CN 113306175A.
However, in the process of implementing the technical scheme of the invention in the embodiment of the application, the inventor of the application finds that at least the following technical problems exist in the above technology:
1. the bonding fastness between each prefabricated plate is unstable, and the defects of insufficient bonding force, easy tearing of a blade girder, layering and the like are easily caused.
2. The process of laying and tearing off the release cloth improves the complexity of the technological process and prolongs the production period;
3. the release cloth is made of PA66 plastic, and the release cloth is torn off and discarded after production, so that resources are wasted and the environment is polluted.
Disclosure of Invention
The invention solves the problems existing in the production of the girder of the blade in the prior art by providing a preparation method of the large Liang Laji plate of the blade without release cloth and a product thereof.
In order to solve the technical problems, the invention provides a preparation method of a large Liang Laji plate of a release-free cloth, which comprises the steps of firstly pulling yarn raw materials to pass through a yarn collecting plate to discharge yarns under the traction of a pultrusion device, then sequentially pulling the yarn raw materials to a glue groove and a curing device, respectively carrying out resin glue dipping and curing molding to obtain a plate, and then carrying out plasma activation treatment and rolling on the plate.
In a preferred embodiment of the invention, the traction speed is between 0.1m/min and 0.9m/min.
In a preferred embodiment of the present invention, the process conditions of the plasma activation treatment are as follows: the plasma emission frequency is 40-50 kHz, and the power is 500W.
In a preferred embodiment of the present invention, the resin glue solution is added with 0.1-0.5% by mass of radical scavenger.
In a preferred embodiment of the present invention, the resin glue is an epoxy resin glue.
In a preferred embodiment of the present invention, the heat curing includes both a mold curing and an oven curing.
In a preferred embodiment of the invention, the die curing is divided into three heating zones along the pulling direction, at temperatures of 145-155 ℃, 170-150 ℃ and 190-200 ℃, respectively.
In a preferred embodiment of the invention, the oven curing is divided into four stages along the pulling direction, the temperatures being 110-120 ℃, 130-140 ℃, 150-160 ℃ and 170-180 ℃, respectively.
In a preferred embodiment of the present invention, the yarn raw material is at least one of glass fiber yarn and carbon fiber yarn.
In order to solve the technical problems, the invention also provides a large Liang Laji blade plate which is prepared by adopting the preparation method.
The beneficial effects of the invention are as follows: according to the preparation method of the release-cloth-free blade large Liang Laji plate, the release cloth is not used, the technological process is simplified and efficient, the fiber yarn and the resin glue solution are directly used as raw materials to be impregnated and solidified into the plate, the surface energy of the plate is effectively improved through plasma activation treatment on the surface of the plate, and the prepared blade large Liang Laji plate has good mechanical property and high bonding strength with poured resin.
Drawings
FIG. 1 is a schematic process flow diagram of a preferred embodiment 1 of a method for preparing a release-free large Liang Laji sheet;
the components in the drawings are marked as follows: 1. glass fiber yarn, a yarn frame, a yarn collecting plate, a glue groove, a curing device, a plasma emitter, a mould and an oven.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
Referring to fig. 1, an embodiment of the present invention includes:
the invention discloses a preparation method of a large Liang Laji plate without release cloth, which directly takes fiber yarns and resin glue solution as raw materials, directly heats and cures the fiber yarns impregnated with the resin glue solution into a plate under the condition of not using the release cloth, and then carries out plasma activation treatment on the surface of the plate so as to excite hydrogen bonds on the surface of the plate, improve the polarity, increase the chemical energy on the surface of the plate and further improve the bonding strength with poured resin.
Example 1
A preparation method of a large Liang Laji plate without release cloth, which takes glass fiber yarns as yarn raw materials to prepare a glass fiber pultruded plate with the specification of 115mm multiplied by 5mm, namely a large Liang Laji plate, specifically comprises the following steps:
as shown in fig. 1, with a 10 ton pultrusion crawler as a traction device, 410 glass fiber yarns 1 with the model of THM-1 are drawn through a creel 2 to pass through a yarn collecting plate 3 to finish yarn discharging, then sequentially drawn through a glue groove 4, a curing device 5 and a plasma emitter 6 to respectively finish gum dipping treatment, heating curing and plasma activation treatment, and finally rolled up to obtain the large Liang Laji blade plate. The drawing speed of the whole preparation process is 0.5m/min.
The resin glue solution used for the gum dipping treatment is epoxy resin glue solution, the model is 5241A, and the model of the epoxy resin curing agent is 5245B. The epoxy resin glue solution is also added with a free radical scavenger with the mass percent of 0.2 percent and Tinuvin770DF, and the effect of plasma activation can be improved through the addition and use of the free radical scavenger.
The heat curing includes two stages, mold curing and oven curing (also known as post curing). Wherein, the mold curing is performed in the mold 51, and three heating sections are divided into the mold 51 along the traction direction, and the corresponding heating curing temperatures of the three heating sections are 150 ℃, 175 ℃ and 195 ℃ in sequence.
The oven curing is carried out in ovens 52, the number of ovens 52 being 4 along the pulling direction, the corresponding heat curing temperatures being 115 ℃, 135 ℃, 155 ℃ and 175 ℃ in sequence. The curing cross-linking degree of the resin glue solution is effectively improved through two-stage curing of mold curing and oven curing, and the mechanical strength of the formed plate is improved.
The conditions of the plasma activation treatment are as follows: the formed plate passes through a plasma emitter 6 at a traction speed of 0.5m/min, and the plasma emitter 6 continuously emits a plasma beam to the surface of the plate under the conditions of power of 500W and 40kHz so as to excite hydrogen bonds or polarities on the surface of the plate, thereby increasing the surface energy of the plate and improving the bonding strength with later-period pouring glue solution.
Example 2
The difference from example 1 is that no radical scavenger is added to the resin dope.
Comparative example 1
The difference from example 1 is that no radical scavenger was added to the resin dope and no plasma activation treatment was performed.
Comparative example 2
The difference from example 1 is that the radical scavenger was not added to the resin dope and the plasma activation treatment was not performed, but a release cloth was used before the heat curing.
Test
The large Liang Laji blade plates prepared in examples 1 and 2 and comparative examples 1 and 2 are used as raw materials, epoxy resin glue solution is respectively poured on the surfaces of the pultruded plates under identical conditions, the surfaces of the pultruded plates are cured and molded under identical conditions, and the bonding strength between the pultruded plates and the surface resin of the pultruded plates after curing is tested. Curing conditions: the heat curing is carried out at 30 ℃ for 1h, at 100 ℃ for 1h, and at 120 ℃ for 2h.
The testing method comprises the following steps: GIC match test, test standard ASTM D5528. The test results are shown in table 1 below.
TABLE 1
| Example 1 | Example 2 | Comparative example 1 | Comparative example 2 | |
| Fracture toughness J/m 2 | 229 | 216 | 181 | 195 |
As is clear from the comparison of the data of example 2 and comparative example 2, the bonding strength between the blade large Liang Laji plate and the poured resin was higher than that in the case of using the release cloth in the prior art, when the release cloth was not used and the plate was subjected to the plasma activation treatment.
As is clear from the comparison data of example 1 and example 2, the bonding strength between the large blade Liang Laji plate and the poured resin was further improved by adding the radical scavenger to the resin glue solution, i.e., the radical scavenger enhanced the effect of the plasma activation treatment.
According to the preparation method of the release-cloth-free large-blade Liang Laji plate, the release cloth is not used, the fiber yarn and the resin glue solution are directly used as raw materials for impregnation and solidification to form the plate, the surface energy of the plate is effectively improved by carrying out plasma activation treatment on the surface of the plate, and the prepared large-blade Liang Laji plate has good mechanical property and high bonding strength with poured resin.
The preparation method of the large blade Liang Laji plate omits the processes of laying the release cloth and removing the release cloth after molding, simplifies the whole preparation process flow, has high production efficiency, improves the yield of the large blade Liang Laji plate, improves the quality stability of the large blade Liang Laji plate, and avoids the defect of low local bonding strength.
In addition, the invention does not use release cloth, reduces the cost of raw materials and reduces environmental pollution.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. A preparation method of a large Liang Laji plate without release cloth is characterized in that under the traction of a pultrusion device, yarn raw materials are firstly pulled to pass through a yarn collecting plate to discharge yarns, then sequentially pulled to a glue groove and a curing device to infiltrate resin glue solution and cure and form, a plate is obtained, and then plasma activation treatment and rolling are carried out on the plate.
2. The method for manufacturing the release-cloth-free large Liang Laji blade plate according to claim 1, wherein the pulling speed is 0.1-0.9 m/min.
3. The method for preparing the release-cloth-free large Liang Laji blade plate according to claim 2, wherein the plasma activation treatment process conditions are as follows: the plasma emission frequency is 40-50 kHz, and the power is 500W.
4. The method for preparing a release-cloth-free large Liang Laji blade plate according to claim 3, wherein the resin glue solution is added with 0.1-0.5% by mass of free radical scavenger.
5. The method for manufacturing a release-cloth-free large Liang Laji blade plate according to claim 4, wherein the resin adhesive is an epoxy resin adhesive.
6. The method of manufacturing a release-free release-fabric large Liang Laji blade plate of claim 5, wherein the heat curing comprises two steps, mold curing and oven curing.
7. The method of manufacturing a release-cloth-free large Liang Laji sheet according to claim 6, wherein the mold is solidified in three heating sections at 145 to 155 ℃, 170 to 150 ℃ and 190 to 200 ℃ along the drawing direction.
8. The method of manufacturing a release-cloth-free large Liang Laji sheet according to claim 6, wherein the oven curing is divided into four stages along the pulling direction, the temperatures being 110 to 120 ℃, 130 to 140 ℃, 150 to 160 ℃ and 170 to 180 ℃, respectively.
9. The method for manufacturing a release-free large blade Liang Laji plate according to claim 1, wherein the yarn raw material is at least one of glass fiber yarn and carbon fiber yarn.
10. A large Liang Laji blade sheet prepared by the method of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211330013.6A CN116330711A (en) | 2022-10-27 | 2022-10-27 | Preparation method of release-cloth-free large Liang Laji plate and product thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211330013.6A CN116330711A (en) | 2022-10-27 | 2022-10-27 | Preparation method of release-cloth-free large Liang Laji plate and product thereof |
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| Publication Number | Publication Date |
|---|---|
| CN116330711A true CN116330711A (en) | 2023-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211330013.6A Pending CN116330711A (en) | 2022-10-27 | 2022-10-27 | Preparation method of release-cloth-free large Liang Laji plate and product thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117162561A (en) * | 2023-11-02 | 2023-12-05 | 中材科技风电叶片股份有限公司 | Thermoplastic composite girder forming method and wind power blade girder |
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2022
- 2022-10-27 CN CN202211330013.6A patent/CN116330711A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117162561A (en) * | 2023-11-02 | 2023-12-05 | 中材科技风电叶片股份有限公司 | Thermoplastic composite girder forming method and wind power blade girder |
| CN117162561B (en) * | 2023-11-02 | 2024-03-22 | 中材科技风电叶片股份有限公司 | Thermoplastic composite girder forming method and wind power blade girder |
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